Question 10 what type of plate boundary is found off the nw coast of the u. s.?

Cascadia Subduction Zone,

Explanation:

Also referred to as e Cascadia fault is known as a convergent or destructive plate boundary that stretches from northern Vancouver Island in Canada to the northern California in the united states. It's a very strong sloping and subducting zone and moves to the eastern side of northern continental Europe. In 1980 the cascades were more active zones of subduction of a ring of fire and water to be found similar to the chile, Alaska, and japan by the location of megathrust earthquakes. This Cascadia subduction zone is about 1000 km as a long dipping fault separates the Juan de Fuca to North America and thus creates a ridge type from the pacific ocean and forms a zone of cascade volcanic arc.